ages = [5,31,43,48,50,41,7,11,15,39,80,82,32,2,8,6,25,36,27,61,31]
import numpy
result=numpy.percentile(ages,75)
print("75%的人年龄在",result,"及以下")

result=numpy.percentile(ages,90)
print("90%的人年龄在",result,"以下")